Machine for grinding glass articles.



Patented Dot. l0, |899.

E. F. GENNERT. MACHINE FOR GBINDING GLASS ARTICLES.

(Application Bled Jeux. 17, 1599.)

2 Sheets-Sheet I.

(No Model.)

Y z Noam; PETERS cu, Pnorauwo. msumefom No. 634,452. Patented oct. lo, |899.

E. F. GENNERT.

MACHINE FOB GBINDING GLASS ARTICLES.

(Application filed Jan. 17, 1899.)

(No Model.)

2 Sheets-Sheet 2,

UNITED STATES PATENT EETCEG EMIL F. GENNERT, OF NEV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 634,452, dated October 10, 1899.

Application led January 17, 1899. Serial No. 702,431. (No model.)

T0 @ZZ whom it' may concern,.-

Be it known that l, EMIL F. GENNERT, a citizen of the UnitedStates, and a resident of New York, (Brooklyn,) in the county of Kings and State of New York, have invented a certain new and useful Machine for Grinding Glass Articles, of which the following is a specification.

This invention has especial reference to machines for grinding v the edges of scalloped glass globes; and it consists in certain peculiarities in the construction and arrangement of the several parts and in certain novel combinations of elements, substantially as hereinafter described,and particularly pointed out in the snbjoined claims.

The objects of the invention are to provide a simple, durable, and inexpensive machine particularly designed for grinding the edges of fluted glass globes and the like which, iirst,will be capable of grinding uniformly and accurately globes of irregular shape as Well as those of truly cylindrical form; second, will automatically manipulate the blank and control the grinding thereof, so as to make it necessary only for the attendant to remove finished globes and insert unfinished ones; third, will be so constructed as to provide for various adjustments required to assure accurate work'on differentglobes; fourth, will reduce to a minimum liability of breaking the globe in the process of grinding, and, fifth,l

fluted globes and the like and the device will be capable of a most extended application in respect to the kind and size of the article operated on. by the construction illustrated in the accom-l panying drawings, in whicl1 Figure lis a front View of a part of a grinding-machine embodying my improvements, showing different forms of grinding-wheels, either of which is capable of attaining an advantageous result. tion on line x, Fig. l, showing the parts in the position they occupy while grinding a luted glass globe. Fig. 3 is a similar view showing the position of the parts while a fin- These objects are accomplished' Fig. 2 is a vertical secr ished globe is being removed and an unfinished one inserted. Fig. is a plan View of the machine. Fig. 5 is adetail front view of the leg having means for guiding the blank-supporting means in its descent and limiting the depth of the scallop. Fig. 6 is a side view of the same and also shows the rod and springclip for holding the blank-supporting means elevated. Fig. 7 is a detail representation of the rotativeY head which isengaged by the blank, and Fig. S is a detail sectional reprei sentation showing the manner in which the blanksupporting means are held elevated.

The same reference numerals and letters designate the same parts in the several figures.

In preparing the blank for the action of my grinding device the glass is molded in a mold having alternate depressions and elevations on its body of the desired shape and depth. These alternate depressions and projections form the flutes or sections of the globe or otherarticle. Said mold is also constructed to produce a blow-over turned out at an acute angle to the axis of Athe blank, and said blowover is removed by filing or otherwise on the lines of the upper edges of the flutes, thus forming a variable edge, according to the form or depth of the tlutings. The globe is finished by'placing it in the present machine, which grinds the said edge and thus finishes i the scallops. will cause the grinding device to be worn uniformly all around instead of to a greater de-r gree at one part than another, whereby thev use of the device will result in a material re` duction in the cost of grinding` the edges of- The above is the process which has been employed for preparing the globe for the action of the grinding-machine forming the subject-matter of this application; but said proc- 'essfornis no part of this invention, and this machine is not limited in its use to'globes formed according to said process, but mention of the process is made herein, nevertheless, as it is thought that the operation and advantages of the machine will thereby best be understood.

The construction of the machine is as follows:

` l designates a suitable frame, and 2 the main shaft from which power is transmitted to the grinding-wheel 3 and head 4. The grinding-wheel 3 is mounted on a short shaft 5, which is journaled in bearings on the upper portion of the frame'and' is connected with the shaft 2 by the pulleys 6 6 and belt 7,

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and said wheel runs in a trough S, which contains sand and water, in which the lower portion of the wheel is immersed. lly the arrangement shown sufficient sand and water are applied to the wheel at all times without liability of getting into the bearings of shaft 5. In practice there are several troughs and grinding-wheels in the machine, and all of said grinding-wheels are driven from the main driving-shaft 2. The working face of the grinding-wheel is preferably in the form of the equatorial zone of a sphere, as indicated at the left-hand side of Fig. l; but it may be spherical, as shown at the right-hand side of said figure, the object being that such working face shall be curved uniformly in all directions as contradistinguished from that of a grinding-wheel of conical or oval form or a grinding-wheel with a working face having a transverse curvature substantially greater or less than the curve struck from the axis of rotation.

The blank X to be ground is mounted on the head l, which latter is arranged in such relation to the wheel 3 as to hold the edge of said blank in engagement with the grindingsurfacc of said wheel. ln the operation ol' the device the blank 'is revolved in a direction at or about a right angle with that of the grinding-wheel, so that every portion of the surface of the grinding-wheel is presented to the blank, whereby the surface of said wheel is worn away uniformly instead of being grooved or scored by repeated use, thus overcoming a serious objection found to exist with the use of cone-shaped grinding-wheels upon the ends of which the articles to be ground are slipped. The size of the grinding-wheel is proportional tothe particular size of globe to be operated on. Thus fora four-inch globe it is preferred to use a wheel having a radius of six inches, and for an eight-inch globe a wheel having a radius of ten inches should be employed. The uniform wear upon the wheel permits it to be used for smaller globes when worn too milch for the size for which it was made, and so on down from a larger to a smaller size until it is entirely worn away, thus overcoming the expense, loss of time, and waste incident to re-turningseored grinders, as heretofore, besides prolonging the period of usefulness of the wheel. The several grinding-wheels of the machine will prefer'- ably be of different sizes.

Another important advantage possessed by the present machine overthegrindingdevices heretofore proposed for scalloping glass globes is that with it there is no necessity to crowd the blank up onto the grinder, whereby the liability of breaking the glass in the proc ess of grinding it (which breakage of glass has been of very frequent occurrence heretofore) is reduced to a minimum.

In the preferred embodiment of myinvention shown in the accompanying drawings the shaft 2 is provided with a worm 0, which meshes with a worm 10 on an inclined shaft Vl l, and said shaft ll has a beveled gear l2, which meshes with a similar gear 12:5, mounted on the end of a horizontal shaft l-l. Said shaft 1l is provided with a pulley 15 foreach rotative head of the machine, and said heads are each carried by a short vertical shaft le', having a pulley 17, connected by a belt 18 with the adjacent pulley 15. By this means motion is transmitted from the shaft 2 to the several heads 4 and the latter caused to rotate with less speed than said shaft 2. The shafts 11. and 1t are supported by a suitable number of properly-arrauged brackets, of which some are shown at 15), 20, and 2l. The shaft 1G is journaled in the arms of a yoke 22, which is so mounted on an arm 23 that it may be positioned to bring the blank over the center of the grinding-wheel and adjusted to cause said work to rotate at a right angle with said wheel. lt isheld in adjusted position by a set-screw 2-l-.

designates the main supporting-arm'for the head. Said arm is pivoted upon shaft 14 and has a block 2G secured to the underside of its forward end. Into or through said block extends the arm 225, whereby said arms 23 and 25 have telescopic connection with cach other. 'lh us not only is the voke adjustable on the arm 23, but said arm 23 is adjustable forward and rearward upon arm 25 for the purpose of lengthening or shortening the blank-supporting means. Adjustably mounted on the rear end of said arm 27 is a weight 27, (or other suitable means may be employed in lieu thereof,) which acts as a counterbalance and regulates the degree of pressure of the blank X upon the grinding-wheel.

28 designates a leg having an opening 2U in its top and a laterally-extending offset or ange'SO at the base of said opening. Said opening receives the block 2G and guides the arms 23 and 25 in their movement, and asetscrew 3l, threaded through said offset 30, is

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set to stop the downward movement of said arms, and consequently of the blank X, when the desired depth of scallop has been produced or finished and is adjustable to adapt the device to produce or finish various depths of scallops. The rear end of the arm 25 is formed or provided with a hook 32, and when the supporting-arm 25 is turned on its fulcrumal point to enable a new blank to be placed on the head -L said hook 32 is received by a spring-clip 33, arranged at the rear end of an inclined rod 3st, whereby the parts are automatically locked in elevated position while the finished globe is being removed and a blank inserted. The rod 3-1 extends through the leg 2S and is secured adjustably thereto by the set-screw 35, so as to be in accord with the height required to elevate the armsin order convenientlyto effect an exchange of a finished globe for an unfinished one. The head 4 preferably is adjustably screwed upon the end of the shaft 16 and is preferably conical in shape and made of a material which will hold the blank by friction.

From the above it. will be seen that various adjustments are provided whereby the blank may be conveniently and easily positioned in respect to the grinding-wheel in the place necessary to effect the best results.

The machine is entirely automatic in grinding, and after the proper adjustments have been made one boy can manage several, as he is only required to lift the head, substitute a blank for the finished globe, and drop the head,which obviously can be very quickly done.

To keep the rotating mechanism of the head free from the sand and water, said rotating mechanism is incased by a hood or shield 36, which is closed at the bottom and front, but may be open at the top and back to afford access to 4the adjusting-screw 24, yoke 22, and arm 23.

Having thus described the invention, what I believe to be new, and desire to secure by Letters Patent, is-

-I. In a machine for grinding the edge of a flutedglass article, the combination of the grinding-wheel, the working face of which is in the arc of a circle struck from its axis, a holding means for the glass article, means for rotating said grinder, and devices for rotating said holding means in a direction at or about a right angle with that of said grinder, so as to present the edges of the liutes successively to the grinder and to cause the latter to wear uniformly, as and for the purpose set forth.

2. In a glass-grinding machine, the combination with the grinder, of a head for holding' the article to be ground, a pivoted supporting-arm connected with said head, and counterbalancing means for said arln.

3. In a machine -for grinding scallops, the combination with the grinder, of a head for holding the article to be ground, a pivoted supporting-arm connected with said head, counterbalancing means for said arm, and an adjustable stop engaging said arm and limiting the depth of the scallop, substantially as described.

4. In a glass-grinding machine, the combination with the grinder, of a head for holding the article to be ground, a pivoted supporting-arm for said head, and a spring-clip to engage said arm when the head is elevated.

5. In a glass-grinding machine, the combination with the grinder, of a head for holding the article to be ground, a pivoted supporting-arm for said head, having a hook at its rear end, an adjustable rod, and a spring-clip at the end of said rod to engage said hook when the head is elevated.

6. In a glass-grinding machine, the combination with the grinder, of a head for holding the article to be ground, a pivoted supporting-arm, means for adjustably connecting said head with said arm, a leg having an opening to receive said arm, and a stop-screw to engage said arm.

7. The combination with the grinder and the rotative head, of a supporting moans for said head pivoted to swing the latter into and out of operative relation with the grinder, said supporting means having a plurality of arms slidably connected together, whereby it may be lengthened or shortened, substantially as described and for the purposes set forth.

S. In a glass-grinding machine, the combination with the grinder, of a pivoted arm, a second arm slidably mounted on said pivoted arm, a yoke adjustably mounted on said second arm, a shaft borne by said yoke, a head for holding the article to be ground, carried bysaid shaft, and means for rotating said shaft.

9. In a glass-grinding machine, the combination with the grinder, of a pivoted supporting-arm, a head for supporting the article to be ground, connected with one end of said arm, and a weight adjustably mounted on the other end of said arm, as and for the purpose set forth.

l0. In a glass-grinding machine, the combination with the frame, a trough for containing an abrasive substance, and a grindingwheel in said trough, of a head for holding the article to be ground, a rotative shaft supporting said head adjacent to the grindingwheel, a yoke for supporting said shaft, and a shield inclosing said yoke.

Il. In a glass-grinding machine, the combination with the frame, a trough for containing an abrasive substance, and a grindingwheel in said trough, of a head for holding the article to be ground, a rotative shaft supporting said head adjacent to the grindingwheel, a yoke for supporting said shaft, a pivotally-supporting arm for the yoke, and a shield inclosing said yoke, said shield being closed at the bottom and open at the top, substantially as described and for the purposes set forth.

l2. In a glass-grinding machine, the combination with a rotative shaft, and a rotative grinder, of a counterbalanced arm pivoted between its ends on said shaft, and a shaft supported by said arm and provided with a head to hold the glass being ground, the latter shaft being driven from the first-mentioned shaft in a direction at an angle to that of the grinder, substantially as described and for the purposes set forth.

13. In a machine for grinding the iuted edges of scalloped globes and the like, the combination with the frame, a main driving-shaft, a rotative grindingwheel driven by said main shaft, a second shaft, and speed-reducing mechanism connecting the second shaft with the main shaft, of a counterbalanced arm pivoted between its ends on said second shaft, a shaft supported by said arm and provided with a head to hold the article to be ground, means for driving the latter shaft from said second shaft so as to rotate the head at an angle to that of the grinder, substantially as described and for the purposes set forth.

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ll. In a glass-grinding machine, the combination with a rotative shaft, and a rotative grinder, of a counterbalanccd arm pivoted bctween its ends on said shaft, a shaft supported bysaid arm and provided with a head to hold the glass being ground, means for driving the latter shaft from the first-mentioned shaft in a direction at an angle to that in which the grinder rotates, and means for automaticallyengaging the end ofthe pivoted arm and holding the same when turned todisengage the glass from the grinder.

15. In a glass-grinding machine, the combination with a rotative shaft having a head to hold the article to be ground, a grinder, and a pivoted supporting-arm for said shaft, of a leg having means for limiting the depth of the grinding operation, and a rod supported by said leg and having means to engage said arm and hold the shaft elevated when the arm has been turned to disengage the article from the grinder.

16. In a glass-grinding machine, the combination with a grinder, and a rotative head for holding the article to be ground, of a pivoted supportingarm for said head, a leg having an opening to receive said arm and a stop to engage the same, and a rod supported by said leg'and having means to engage said arm and hold the head elevated when the arm has been turned to discngage the article from the grinder.

17. In a glass-grinding machine, the combination with a grinder, and a rotative head for holding the article to be ground, of a pivoted snpportingarm for said head, constructed in Sections telescopically connected together, a leg having an opening to receive said arm and a stop to engage the Same, and a rod adjustabl y attached to said leg,r and having means at its end to engage said arm and hold the head elevated from the grinder.

Signed at New York, in the conntyiof New York and State of New York, this 29th day of September, A. D. 1898.

EMIL F. GENNERT.

Witnesses E. WHITNEY, CHAS. J. STOCKMAN. 

